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https://issues.apache.org/jira/browse/YARN-4985?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15858743#comment-15858743
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Haibo Chen commented on YARN-4985:
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Uploading a patch for preliminary review. The hbase-backend module has been
split into two separate modules based on the versions of
hadoop-common/hdfs/auth that they need to run under. Coprocessor code and code
in hbase-tests are now in the same module, that is,
*timelineservice-hbase-server, which depends on *timelineservice-hbase-client
that includes all table schema and hbase code executed in YARN trunk. YARN-6094
has enabled dynamic loading of coprocessor from HDFS, now if coprocessor code
lives in a hbase-server jar that depends on hbase-client jar, I don't think the
dynamic loading from HDFS will work unless HBase somehow knows how to pull in
the dependent jars. Thoughts on workaround, [~sjlee0]? In the meantime, I will
continue to verify maven dependencies to make sure they are clean.
> Refactor the coprocessor code & other definition classes into independent
> packages
> ----------------------------------------------------------------------------------
>
> Key: YARN-4985
> URL: https://issues.apache.org/jira/browse/YARN-4985
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: timelineserver
> Reporter: Vrushali C
> Assignee: Haibo Chen
> Labels: YARN-5355
> Attachments: YARN-4985-YARN-5355.prelim.patch
>
>
> As part of the coprocessor deployment, we have realized that it will be much
> cleaner to have the coprocessor code sit in a package which does not depend
> on hadoop-yarn-server classes. It only needs hbase and other util classes.
> These util classes and tag definition related classes can be refactored into
> their own independent "definition" class package so that making changes to
> coprocessor code, upgrading hbase, deploying hbase on a different hadoop
> version cluster etc all becomes operationally much easier and less error
> prone to having different library jars etc.
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